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ASF GitHub Bot commented on FLINK-3943: --------------------------------------- Github user twalthr commented on the issue: https://github.com/apache/flink/pull/2169 @mushketyk Thanks for the PR. I also reviewed the current status. I think it's good to compare your code with #2159 before you rework it. > Add support for EXCEPT (set minus) > ---------------------------------- > > Key: FLINK-3943 > URL: https://issues.apache.org/jira/browse/FLINK-3943 > Project: Flink > Issue Type: New Feature > Components: Table API & SQL > Affects Versions: 1.1.0 > Reporter: Fabian Hueske > Assignee: Ivan Mushketyk > Priority: Minor > > Currently, the Table API and SQL do not support EXCEPT. > EXCEPT can be executed as a coGroup on all fields that forwards records of > the first input if the second input is empty. > In order to add support for EXCEPT to the Table API and SQL we need to: > - Implement a {{DataSetMinus}} class that translates an EXCEPT into a DataSet > API program using a coGroup on all fields. > - Implement a {{DataSetMinusRule}} that translates a Calcite {{LogicalMinus}} > into a {{DataSetMinus}}. > - Extend the Table API (and validation phase) to provide an except() method. -- This message was sent by Atlassian JIRA (v6.3.4#6332)